Pneumatic shuttle-motion for looms.



No. 674,157. Patented May I4, 190|. w. Hi BAKER & F. E. KIP.

PNEUMATIC SHUTTLE MOTIN FOR LUDMS.

(Application tiled M'ar. 23, 1900.)

(No Model.) 2 sheets-sheet l.

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PNEUMATIG SHUTTLE'MOTION FOR LUOMS.

(Application led Mar. 23, 1900.)

2 Sheets-Sheet 2.

(No Model.)

INVENTORS WITNESSES:

ATTORNEY ravens cc, Pnoournc WASHINGTON D c UNITED STATES PATENT OFFICE.

WILLIAM H. BAKER, OF CENTRAL FALLS, RHODE ISLAND, ANDFREDERIC E. KIP, OF MONTOLAIR, NEW JERSEY.

PNEUMATIC SHUTTLE-MOTION FOR LOOMS.

SPECIFICATION forming` part of Letters Patent N o. 674,157, dated May 14, 1901.

Application filed March 23, 1900. Serial No. 9,842. (No model.)

To a/ZZ whom t may concern:

Be it known that we, WILLIAM H. BAKER,l

tain new and useful Improvements in Pneu matic Shuttle-Motions for Looms, of which the following is a specification.

This invention relates to the class of looms wherein a compressed aeriform liuid, as compressed air, is employed for picking or driving the shuttle. In this class of looms the shuttle is usually made to fit snugly into the shuttie-box, somewhat in the manner of a piston in a cylinder, and when the shuttle is expelled the compressed luid following it is apt to break or disarrange the Warps. Hence it is very important in order to avoid such injury to the warps to elfect in some mannerv a de lection of the compressed duid or the main portion thereof laterally, upward, or downward before it can escape from the receiving end of the shuttle-box.

The object of the present invention is to provide means for so deliecting the compressed fluid, and said invention is illustrated in the accompanying drawings.

In the drawings, Figure l is a front elevation of a part of a loom provided with our improvements; and Figs. 2 and 3 are enlarged detail views of the shuttle-box, Fig. 2 being a sectional plan and Fig. 3 a sectional front view thereof. Fig. 4 is a modification of th device for deflecting the iiuid.

Referring primarily to Figs. l, 2, and 3, a represents the loom-frame; b, the breast-beam forming apart thereof; c, the lay; d, the reed; e, the shuttle-box mounted thereon ;f,the swingrail; g, the lay-swords; h, the crank-shaft for operating the lay, and t' a shaft driven therefrom through gearsj.

k is a pipe to lead compressed air (from any source) to a'charge-holder Z. m is a valve controlling the entry of air to said holder.

n is a pipe leading air from the holder.

0 is a pipe swiveled to the pipe n atp in line with the swing-rail. Said pipe o is connected at its upper end with the shuttle-box and vibrates with the lay. A valve q controls the flow of air from the holder l, said "or driving the shuttle s.

All of the above features are shown in our Patent No. 659,950, of October 16, 1900, and are not in themselves claimed herein, but are used for purposes of illustration.

Referring particularly to Figs. 2 and 3, two swing-valves t t are hinged in the shuttle-box, Fig. 2, and are held open so as to lie out of `the path of the shuttle by light springs u. The valves are xed on their hinge-pins o and have fixed on said pins outside of the box two intermeshing segment-gears w, which compel the valves to move together. The ends of the springs u are connected to arms on said hinge-pins or on the gears. Preferably the shuttle-box c will have two box-like recesses a; for the open valves t t to fold into. Air-conduits yy are situated at opposite sides of the shuttle-box and connected at one end y' with the interior of the box at some point between the valves tand the position occupied by the shuttle when the latter is in the box and at the other end withv the respective recesses behind the respective open valves. The recesses are open' to the atmosphere through apertures z.

The operation is simple. When compressed air is admitted behind the shuttle, the latter is driven out toward the right in the drawings. As its tail passes and uncovers the inlets y' to the conduits y the compressed air enters the conduits and passing through them impinges upon the valves t, so as to close them behind the shuttle as the latter leaves the boX. The valves close together in the V-like position indicated in dotted lines in Fig. 2, their meeting edges being beveled to produce a snug fit and prevent the escape of any considerable amount of air between them.

lateral direction, and, if desired, it may be led to any point from the apertures z where its discharge will produce no injurious effect.

It is not material to our invention whether IOO the valves t be placed above and below or at the sides of the box. They will remain closed 4until the pressure of air in the box is low enough to be overcome by the springs 1.1 when the latter will open them, so that the shuttle may enter from the opposite side of the loom without contact with them.

Fig. 4 shows means for deflecting laterally the charge of air that has expelled the shuttle. In this construction the shuttle-box is connected at its front part through conduit l with an exhaust-cylinder 2, mounted on the loom-frame and having in it a piston 3, connected by a rod 4 with a lever 5, fulcrumed on theloom-frame. Thislevercarriesa roller 6, which bears on a cam 7, rotatable with a shaft S of the loom. The cam 7 is so set that at the moment the picked or driven shuttle uncovers the port of the conduit 1 the cam will quickly draw down the piston 3, thus producing a vacuum in the relatively large chamber in the cylinder 2, produced by the displacement, and the compressed air will thus be deflected to the cylinder. The size of the cylinder and the stroke of the piston may be varied to snit the circumstances. The piston may be returned to the position seen in Fig. 4 by a spring 9 or other known means. This construction of Fig. 4 is best adapted to looms where the shuttle box is fixed at the picking-point and does not vibrate with the lay.

Being the first, so far as we are aware, to provide a loom wherein the shuttle or weftcarrier is picked by an aeri form fluid under tension with means for delecting the picking` charge of iuid or the major portion thereof after it has done its work, we do not limit ourselves to any specific means for doing this. Ve have shown two devices whereby it may be effected; but we should consider any means by which the tension of the charge of fluid in the box behind the shuttle is materially reduced by deflection as soon as it has done its work to be within the scope of our invention.

Our invention may be applied to looms wherein the shuttle is picked by an aeriform :fluid from a shuttle-box forming one of a series of shuttle-cells in a magazine-such, for example, as the magazine illustrated in our Patent No. 659,950,0f October 16, 1900where it forms a part of an automatic weft-supply mechanism, or in a double-shuttle loom of the same character, such as that described in our pending application, Serial No. 739,874,

iiled December 11, 1899.

The purpose of this invention is to provide an automatic means operating synchronously with or controlled by the outgoing shuttle to prevent the picking charge or the major portion thereof from expanding from the entrance of the shuttle-box in the direction of the axis of the box and to relieve the tension by expansion in another direction where it cando no injury.

Gbviously this invention relates to the class of pneumatic devices for driving a shut-tle where the compressed charge impinges directly on the shuttle, as it is only in this class that the expanding charge follows the shuttle into the web or the shed of the loom. Where a piston is interposed between the shuttle and the charge, this difficulty is not experienced. y

In our Patent No. 659,950, before nientioned, lateral apertures are shown in the shuttle-director to allow for some lateral eX- pansion of the charge; but no device or mechanism is shown for preventing expansion of the charge or the major portion thereof in the direction of movement of the outgoing shuttle.

Obviouslyit would be possible to dispense `with one of the by-pass conduits fy, as the valves are compelled to move together, but the two conduits are preferred.

Having thus described our invention, we claim- 1. A loom having means for picking or driving the shuttle or weft-carrier to and fro with a compressed aeriform fluid, and mechanism for deflecting the picking charge, or the major part thereof, after it shall have done its work, said mechanism comprising a pair of valves in the shuttle-box, means for holding said valves normally open, and means for admitting` a part of the picking charge behind said valves to close them,said means being controlled by the outgoing reciprocating shuttle.

2. In a loom, the combination with the shuttle-boX, means for admitting thereto a charge of compressed air for picking or driving the reciprocating shuttle, and the shut tle, of means connected with the shuttle-box and controlled by the outgoing shuttle for deflecting the picking charge, or the major portion thereof, after it shall have done its work, said means comprising the valves t, their springs u, said valves being held open, normally, by the springs, and adapted to close the box, the outlets z in the box, and the conduits gj, substantially as set forth.

In witness whereof we have hereunto signed our names, this 12th day of March, 1900, in the presence of two subscribing Witnesses.

WILLIAM H. BAKER. FREDERIC E. KIP. Vitnesses:

PETER A. Ross, HENRY CoNNE'r'r.

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